Improvement in processes of distilling rosin-oil



pipe, e, is introduced.

separate from the other.

l UNITED STATES MAmsoNl PAGE, -oij wrLLrAMsBUnG,

PATENT. OFFICE.

NEV YORK, ASSIGNOR TO HAWES, OF CHELSEA, MASSACHUSETTS.

lM P-ROVEMENT iN PROCESSES oF D'isrl LLI-Nc no SiN-01| L.

' Specification forming part of Letters Patent No. 9,75?, dated May 14, 1853.

' part thereof.

My method of producing the oils fromrosin for various purposes is substantially as follows: I employ a still of any convenient shape,

one form of which is show-n in Figure l, a, which is awertical sectionthrough its center.` The head and goose-'neck bare of ordinary form, connecting with a condensing-worm, d. The still is also furnished with man-holes and other devices usually found in such structures. To determine with eiractness the degree of heat employed in the process of distillation in these high temperatures, the heat is calculated by the heat of the steam driven off in a manner well known. Into that part of the still above thel material to be distilled a steam- Its end is perforated, and it communicates with a steam-boiler, by which it is supplied. This steam should be 'so introduced as not to be driven in contact with the melted rosin, but only with its vapor .above the body of the still, and in the figure itis for in the following way: The rst process is to eX- traet the acid from-'the rosin, next the naphtha, and lastly the oil, and to procure them each I first charge thestill with resin to about two-thirds of its ca pacity, more or less. The iire is then .kindled under it, and I gradually increase' the heat till the moisture is driven off.' As the heat rises the rosin first swells, and is violently agitated in the rst stages? of manufacture and until the aqueous matter is expelled. I therefore, duringthis part of my process, detach the worin from the goose-neck, as there is some danger ,of an explosion if the still is clbs ed,-in caiseiof an overow. After vall the aqueous'vapor is expelled, the heatis still further raised, and the acid is thus discharged. When this ceases to iiow, the steam is admitted throu gh the pipe e, and the worm is connected nwith the goose-neck, the heat being stillfkept up to the point where the naphtha will pass over with the steam and be discharged in a condensed state from the worm. This temperature must be kept up till the naphtha ceases to fiow, or, rather, has all been discharged. This is 'ascertainedby its quantity, which is about fteen percentum ofthe rosin. lVhen the naphtha ceases to flow, lthe heat, is again raised in the still (the steam being at the same time freely admitted through pipe e) till the oil begins to come over mingled. with the stearrnfand, being condensed in the worm, `runs into a proper receiver. The temperature should be maintained at about the point -where the oil first. begins to come over till it ceases to flow, when the heat is again raised still higher, and a second -portion is distilled over, after which a third increase ofheat takes place and is continued till all the` oil is discharged from the rosin. This will be found to be about sixty-two anda half per centum of the rosin put into the still. The residuum-a pitchy substance-is thendrawn off from the still, which is' thus prepared for a new charge.

To make an oil for lubricating purposes, I take the above-named oils distilled at the lowest temperature and redistill it in the same manner as it wasat irst distilled, introducing the steam freely, as before described, by which the oil is, so to speak, washed while in a vaporous state, and the acid, 8mo., removed which it is fitted for lubricating purposes. For 'curriers oil I usually take that distilled at the next highest temperature, which I redis-l the purest, I employ, after redistilling and the naphtha, acid, 8vo., being removed by the steam.

it will be proper to remark that the reason for steam is to have the purifying effect of it without danger and in a practicable manner, for moisture commingled with melted rosm promore perfectly than in any other way, byY

till in theusamc way with steam, and for the Y same purpose, and the oil last distilled being boiling, for painters purposes, the odor from.

Having thus fully described my purposes,

yand advantage ofmy process of introducing duccs dangerous effects, causing it to swell, boil over, explode, and burn up. It must there- `fore be carefully kept out of the `rosin; but it is of the greatest importance in purifying the product, l'lrovided it can be introduced without danger. The inode of doing this is my device, which is by the introduction of a jet ot' steam into the vapor rising from the still. ltfwater were introduced into the rosin,it would all be driven ot't before it could have any effeet, and would increase the trouble and expense of expelling the aqueous matter already in the rosin, and should steani be'introduced into the inass highly heated an explosion must take place; but byiny arrangement all danger is ayoidcd an'd the full advantages of steam secured.

Having thus fully set forth my invention,

@een

What I claimtherein as new, and for which I desire to secure Letters Patent, isl The employment, in the manner and for the purposes described, in the manufacture of rosin-oils of different qualities, of redistilling the saine, and purifying it, substantially as herein set forth, the introduction of the steam into the commencement of the gooseaieck, above the rosin in thestill, so that the Vaporized oils from the rosin will pass through and be commingled with said steanrin their passage to the worm for condensation, for the purposes of purilioation, &c., as above fully set forth.

, MADISON PAGE.

lvitnesses:

I. HA'rsnL, l v Tiros. E. VARREN. 

